Truthfully, this doesn't sound like a good fit at all, but the one thing you need to understand is that your transition is not just your own, but it is a transition for everyone else around you. Your partner is not experiencing a transition that has been thrust upon him, and frankly, he seems unwilling to move forward.
Maybe he has judgmental feelings about gays or maybe he's just going with the group. Either way, he's in no way ready to be seen as a gay male (which is how you guys would be perceived if you began identifying as a transgendered male).
It's dysphoric for you, but it sounds equally painful for him. Before you try to make him out you guys to your friends, you guys need to have a conversation if he's even able to withstand your transition and if he's ready for the consequences of your transition. At this point, it sounds like he's not, which means your options are to 1) remain patient with him if it sounds like he will eventually come around and is working to do so or 2) separate and transition without him, away from his friends.